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    CVE-2025-47279

    Undici is an HTTP/1.1 client for Node.js. Prior to versions 5.29.0, 6.21.2, and 7.5.0, applications that use undici to implement a webhook-like system are vulnerable. If the attacker set up a server with an invalid certificate, and they can force the application to call the webhook repeatedly, then they can cause a memory leak. This has been patched in versions 5.29.0, 6.21.2, and 7.5.0. As a workaound, avoid calling a webhook repeatedly if the webhook fails.

    Published:May 15, 2025
    Last Modified:Apr 15, 2026
    EPS:May 15, 2025
    EPSS Score:0.00047
    CVSS Score:3.1

    Affected Products

    Vendor
    Nodejs
    Product
    Undici

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-9697 (CVSS 7.4) — Impact: undici's ProxyAgent silently drops the requestTls option when configured with a SOCKS5 proxy URI (sock…
    CVE-2026-6734 (CVSS 7.5) — Impact: When using Socks5ProxyAgent, undici reuses a single connection pool across different origins without v…
    CVE-2026-12151 (CVSS 7.5) — Impact: The undici WebSocket client enforces maxPayloadSize on the cumulative byte count of fragments in a mes…
    CVE-2026-2229 (CVSS 7.5) — ImpactThe undici WebSocket client is vulnerable to a denial-of-service attack due to improper validation of th…
    CVE-2026-1528 (CVSS 7.5) — ImpactA server can reply with a WebSocket frame using the 64-bit length form and an extremely large length. un…
    CVE-2026-1527 (CVSS 4.6) — ImpactWhen an application passes user-controlled input to the upgrade option of client.request(), an attacker …
    CVE-2026-2581 (CVSS 5.9) — This is an uncontrolled resource consumption vulnerability (CWE-400) that can lead to Denial of Service (DoS).…
    CVE-2026-1526 (CVSS 7.5) — The undici WebSocket client is vulnerable to a denial-of-service attack via unbounded memory consumption durin…
    CVE-2026-1525 (CVSS 6.5) — Undici allows duplicate HTTP Content-Length headers when they are provided in an array with case-variant names…
    CVE-2026-22036 (CVSS 5.9) — Undici is an HTTP/1.1 client for Node.js. Prior to 7.18.0 and 6.23.0, the number of links in the decompression…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High